Abstract: Soil compaction is one of the key barriers impacting cropland soil quality and crop growth, and the major concern in the researches of soil functioning and cropland ecosystem health. This paper reviewed the research progress related to the causes, influences, and improvement measures of soil compaction. In considering the affecting factors of soil compaction, farming system and water and fertilizer management should not be ignored, besides agricultural machinery. In addition, the influences of the above factors on soil compaction often changed temporally and spatially. Based on the comprehensive analysis of related researches, some problems to be solved in the research of soil compaction were discussed. It was considered that more attention should be paid on the researches of (1) genetic mechanisms of crop resistance to soil compaction in molecular level, (2) changing process of the interactions between crop and soil under soil compaction by using model and field visual assessment, and (3) improvement measures of soil compaction.

Key words: Benzo(a)pyrene, Boleophthalmus pectinirostris, Liver, Ultrastructure